Jar-closure.



PATENI'ED MAY 3, 1904,

w. ,B. PENN. JAR CLOSURE.

APPLICATION FILED JUNE 10, 1903.

Patented May 3, 1904.

WILLIAM B.

nNN, OF \VASIHNG'IOX, PENNSYLVANIA.

JAR-CLOSURE.

SPECIFICATION forming part of Letters Patent No. 759,168, dated May 3,1904-,

Application filed June 10, 1903- Serial No. 160,830. No model.)

To 11]] who) 1'/- may run/writ:

Be it known that I. Wumiui B. Fess, a citizen of the Unit d States,residing at \Vas'nington, in the State of Pennsylvania. have inventedcertain new and useful improvements in Jul-Closures, of which thefollowing is'a specification.

My invention relates to removable means for effecting hermetical orliquid-tight closurcsof jars, hott h-s, or other like receptacles. Theobjects of my invention are. to provide a closure which rcadilyadjustable to its place and easily remorahlc: to provide a means bywhich the packing" is compressed by reason of the shape of the parts andmay he graduated to anydesircd pressure; to providea cap closure inwhich th capis not brought in contact with any hard material andtherefore may be made of glass without. the necessity of great accuracyin its form; to provide a packing ring which is lirmly h ld in place andyet may be easily removed; to provide a closure of which all the partsare open and removable so as to be easily wash d, and yet when in placear not dependent upon mere friction to hold them in ltihiiiflfl. The.foregoing objects, together with other advantages which will hereinafterappear. l'at jain by the construction and assemblag of parts asillustrated in preferred forms in the accompany iug drawings, whereinFigure] is a vertical central section through my closing device. n a jarm-ck shown in elevation.

Figures 2, 3 and i are perspective viewsof the cap. the packing ring,and the jar neck, respectively, shown s parat ly.

Figure 5 shows a conv nient mode of mak-' ing rubber rings for thepacking, by slicing them off of a tube molded for the purpose.

Figure (3 represents a central section ot'a jar embodying a modificationof my device in which {hi-situation f the thr ads is inverted, makin, agroove in th jar neck instead of a projecting" thread.

For simplicity and ch apni-ss the closure is Hlillll'flf two parts, acap and pat-kin". In

order to avoid the uscol' m talli parts 1 pre- 5 fer to use a glas capand for convenience l arrange it to s"r w upon the jar. sary, however,to avoid contact of the two it. i:- n--cesi readily taken apart andcleaned, as they preparts of glass, because it would be diilicult to litthem nicely together and there is danger of br akage if one part grindsupon the other. Again, means for compressing the packingis necessary toget a good seal. the efore is made by forming both the outer surface ofthe neck of the cssel n, and the inner surface of t-hecap ll, of slopingor conical form, and providing each surface with threads e, y, thereon,which are thus differential in relation, and so gradually reduc thespace between them as the cap I; is screwed on. Between the neck and capis preferably placed a rubber ring ot' the proper consistency, and it isprovided with threads as shown, so as to have an independent hold uponeach the neck and the cap. it will be seen that the ring (I may eitherturn on the neck and more with the cap, or turn in the capaud remainstationary on tlw neck, or turn on both at once; and in any case theturning of the threads compresses the rubber ring and makes an extremelytight seal, not depending on friction to keep it in place.

Upon unscrewing the cap, a very little turn removes it, and the rubberrin; then remains attached to one or the other of the parts. The cap isvery readily put in place and the fact that either cap or ring may turn,imlili'erently, prc"e.'its sticking and renders any adjustnn-ntunnecessary. The form of thread gives a verlv powerful pressi l'r and asecure locking in plane. the glass partsdo not, come into contact, andwhile the contents of the jar only meet the packing on a thin edge, thelatter pres nts a wide thickness between the inside and any port ofescape. in some cases it may be convenient to place the male thread onthe cap and the female thread in the neck, asshown in Figure 6(r' and1/), and in this instauceof course, the positions of the threads in thewall of the ring 1/ are inverted to correspond. .\v series of ribs f,may be used on the cap for aid in turning it. The rings 1/ may he madein any desired manner, either molded conical in form or joinedup from astrip, or sliced from a tube /I, as shown in Figure v The device shownis not only very cheap to make, but it will be sewn that the part car.be

The closure sent n0 undercut surfaces to catch dirt. The commondillieulty of erumpling or bunching, in the use of rubber packing rings,is entirely avoided bytbe peculiar form of ring. as well as by theprovision for free turning of either of the part in screwing to place.Other advantages will readily occur to users of such devices.

Having thus described my invention and 3 illu trated its use, what Iclaim, and desire to secure by Letters Patent. is the following:

1. A jar closure conmri ing in combination a revolvable packing ringprovided with means for holding it upon the jar neck and provided uponits outside with threads arranged upon a sloping surface, and a capprovided with cooperating threads upon its interior, also arranged upona conical or sloping surface, substantially as described.

2. The combination with a cap having an interior conical SlllfllCO, avessel neck harin, a conical exterior surface substantially parallelwith the said cap surface, and an elastic ring provided with means forholding it upon said neck and means for holdingit within said cap.

3. The combination with a vessel neck having means for retainingarevolvable ring thereon, of an elastic ring provided with scrcw-thremlson its outer surface arranged upon a conical face, and a cap cooperatingwith said ring providm with an interior conical face and screw threadsto co-operate with said threads on the rin 4. In a jar closure thecombination with a threaded neck and threaded cap, of a packing ringcomprising a strip of pliable material with screw threads on itsexterior and on its interior surfaces, substantially as described.

in a jar closure the combination with a threaded cap and neck, of anelastic ring pro \idcd with both interior and exterior conical surfaces.each provided with difi'erential threads thereon, whereby the ring maymore either in or on the threads of the neck and cap to tightenthecontact.

The combination of a jar having a coniral neck. a cap having a conicalinterior surface, a ring having parallel surfaces inside and outside,both Surface of said ring and of the cap and of the neck being providedwith dil i'erential threads. substantially as descx ibed.

i'. Ajar closure comprising a screwtl .readed neck. a screw-thremled capand a screwthreadcd packing ring between the two.

5. In a jar closure the combination of a coin ical neck havingdifferential threads, an interiorly conical cap having correspondinglitt'ercntial threads, and a revolrable screwthreaded elastic packingring between the cap and neck; substantially as described.

9. A closure for glass ja rs comprising a pee k provided with thrcads aglass cap provided with corresponding thrcads,:1nd a packin'.

between the cap and neck threads, the threads on both said parts beingof Varyingdiameter with respect to the center of the neck. whereby thespace between the parts. is reduced as the cap is screwed on the neck.substantially MINNIE A. LEoNAnr, ALVAN DORMAN.

